One commuter hits an app on his iPhone waiting on the platform for the train. Onboard, another commuter catches up on paperwork. One reads a book while another carries on a video conversation with friends via her iPad as the sun rises.

YOSEMITE NATIONAL PARK (AP) - A window of time just opened in Yosemite National Park when nature photographers wait, as if for an eclipse, until the moment when the sun and earth align to create a fleeting phenomenon.